How many languages a (C++) expert should speak ?
summary
A four-level chart classifies languages as expert, practical, occasional, hello-world and shows the useful zone is the first three levels; the claim is that expertise is worth one main language (C++) while curiosity and documentation promote others. Recommendation: be expert in one, practice regularly in about 2–4 practical languages, keep a handful at occasional use, and accept some at hello-world CV level; tooling is lightweight study and small practice projects, not full rewrites, and that approach works for long-term refactoring and thinking.
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